Sony is using Wind River Systems' "smart-device" software in its next-generation Network Walkman NW-E3. The device, which weighs less than 2 ounces, has a built-in flash memory module that can hold up to 80 minutes of compressed digital audio. Wind River's software runs the user interface, controls, display, data routing, storage, retrieval and PC connection. The company is based in Alameda, Calif.